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GPS Location via telstra GSM phone

Discussion in 'Hobby Electronics' started by KLR, Dec 28, 2004.

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  1. KLR

    KLR Guest

    Found this (quite by accident) on a camping/4wd site


    Assuming this doesnt simply just give the co-ordinates of the tower
    you are connected to -
    How exactly does this work - if it does give an actual location, or
    more importantly - are there currently mobile phone locating systems
    currently in the system, if so - how do they work (triangulation?) and
    how accurate are they ?

    I cannot test this immediately as I have CDMA not GSM.




    http://www.noboundaries.com.au/Hints and tips.htm

    "Haven't got a GPS to find out where you are? Then use your mobile
    phone. Found this on the MSN Group Sites: 'Golddetecting' and '4WD
    Australia'. To get your GPS position send an SMS message (without
    any text typed) to 1715678 and you will receive a message back with
    your GPS Lat/Long. position, have a pen ready to write it down. I'm
    on the NSW Central Coast area and this is what I received 33.511938,
    151.326392. Works on GSM using the Telstra Mobile Network."
     
  2. I tried this and got the co ords of 33.272992 149.110675, I don't currently
    have a map handy so can't say if this is correct, I am in Orange, central
    west NSW by the way
    Cheers
    Tony..
     

  3. I tried it. It says "message not sent this time". What a shame. I have a GPS
    right here so I could have confirmed its accuracy. I'm in Melbourne on
    Vodafone pre paid.

    Anyone else in melbourne want to try it? Looks like Telstra network might
    work from other reports.

    -H
     
  4. Found this (quite by accident) on a camping/4wd site


    Assuming this doesnt simply just give the co-ordinates of the tower
    you are connected to -
    How exactly does this work - if it does give an actual location, or
    more importantly - are there currently mobile phone locating systems
    currently in the system, if so - how do they work (triangulation?) and
    how accurate are they ?

    I cannot test this immediately as I have CDMA not GSM.




    http://www.noboundaries.com.au/Hints and tips.htm

    "Haven't got a GPS to find out where you are? Then use your mobile
    phone. Found this on the MSN Group Sites: 'Golddetecting' and '4WD
    Australia'. To get your GPS position send an SMS message (without
    any text typed) to 1715678 and you will receive a message back with
    your GPS Lat/Long. position, have a pen ready to write it down. I'm
    on the NSW Central Coast area and this is what I received 33.511938,
    151.326392. Works on GSM using the Telstra Mobile Network."

    ***** The following message presents itself when 1715678 is sent to the
    Telstra network.

    "(Two Cordinates are shown followed by ):-171LOST is a Telstra Research
    protype.It should not be used for any health and safety purposes".

    Brian Goldsmith.
     
  5. Ken Taylor

    Ken Taylor Guest

    On the back of E911 development I suppose.

    Ken
     
  6. Dennis Nolan

    Dennis Nolan Guest

    The coords of Australian capital cities are:
    longitude latitude city name
    138.60 -34.93 Adelaide
    153.02 -27.47 Brisbane
    149.13 -35.30 Canberra
    130.83 -12.45 Darwin
    147.32 -42.88 Hobart
    144.97 -37.82 Melbourne
    115.85 -31.95 Perth
    151.20 -33.87 Sydney

    So assuming that you missed the minus in front of the latitude (ie you
    are in the southern hemisphere) you seem to be more or less directly
    north of Canberra and West of Sydney, most likely Bathurst whose
    coordinates are -33.273 : 149.110

    Regards
    Dennis
     
  7. John Palmer

    John Palmer Guest

    While browsing for something else entirely I came across this site...

    http://www.multimap.com/map/browse.cgi?lat=-33.272992&lon=149.110675&scale=25000&icon=x

    I haven't yet found a location on their site where you load the coordinates,
    so I actually load them into the address bar.

    This link returns a location adjacent to the Orange Showgrounds.When I tried
    the coordinates for my location it returned a location within 100 metres.
     
  8. Lord-Data

    Lord-Data Guest

    I get (-32.93,151.65)
    Followed by:

    "Unable to find a suitable street directory reference"

    Looks like theyr trying to turn this into a pretty full blown service ..
     
  9. Desmond Wong

    Desmond Wong Guest

    Seems that the co-ordinates are switched around. Interesting. Will try later
    today with my GPS and see how accurate it is.
     
  10. Dave

    Dave Guest

    Actually it's seems to be just triangulation since it works with any
    digital mobile - mine doesn't have built in GPS which is what E911
    mainly relies on.

    It's probably why it reports my position as being 6km away from where I
    am, (when compared to my Geko 201 with 8 satellite lock and EPE of 5m).

    Mobile reception where I am is marginal and only one tower to access.

    Dave
     
  11. Ken Taylor

    Ken Taylor Guest

    E911 has to work even with mobiles without GPS fitted. It sounds like you're
    getting the cell site position rather than your position - 6km is too big an
    error for triangulation (I think technically it'd be trilateration, but who
    cares? :)

    Ken
     
  12. s b

    s b Guest

    Aren't SMS to these kinds of numbers considered to be premium and cost
    heaps?
     
  13. Mike Harding

    Mike Harding Guest

    I'll let you know in 30 days :)

    500m out for me.

    Mike Harding
     
  14. "Brian Goldsmith" wrote
    Telstra network.

    "(Two Cordinates are shown followed by ):-171LOST is a Telstra Research
    protype.It should not be used for any health and safety purposes".

    Brian Goldsmith.


    ***** Terry,my reply to your email is bouncing,please contact me.

    Brian Goldsmith.
     
  15. Desmond Wong

    Desmond Wong Guest

    They seem to be fairly accurate, mine which I did today and compared to my
    in-car gps were only out after the hundredth digits (ie 0.0x)

    I suppose it will only be as accurate as triangulation from the towers
    around.
     
  16. KLR

    KLR Guest

    after seeing how other people on here were getting reasonably accurate
    results, I got hold of a Telstra GSM and tried it


    Lat: 25:16:50S (-25.2806) Lon: 152:50:22E (152.8394)



    In my case - this is the precise location of the local telephone
    exchange and phone tower - about 8km away from where the call was
    made

    Its interesting.

    Phone used was a Nokia 6100 if thats of any relevance.
     
  17. Ken Taylor

    Ken Taylor Guest

    Were you close to a cell tower at the time? There seem to be two sets of
    data coming in from people - that the coordinates would seem to be the cell
    sites, or that they are really the user's location. I suspect the former, as
    triangulation, if it were used, should be essentially spot-on.

    A point to note is that if you can send an SMS and get back your location,
    then "......they know where you are".......

    Ken
     
  18. budgie

    budgie Guest

    (snip)

    The name for this type of facility is MOLI (mobile location information). I
    first came across it when working in 000 systems at WAPOL. It's been in the
    wings and under various levels of testing here in Oz for at least five years
    that I'm aware of.

    Early phases simply give the coords of the handling cell site. Next level is
    lateralisation by timing comparisons between cell sites - obviously requires
    three sites minimum for a fix. This has actually been used successfully (driven
    manually) in locating a lost tourist here in WA roughly a year back IIRC.

    Do google search on MOLI and GSM. The first hit I got (aca) gives some info on
    this.
     
  19. Eddie

    Eddie Guest

    not so
    one site with 3 sectorised basestations can give a 120degree arc direction
    from the base as well as measuring the time slot sync advance can give a
    distance to the mobile.
     
  20. Jim

    Jim Guest

    Handy for the spooks , not so handy for the bad guys ?
     
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